I had contacted support several days ago and they reported that there is a problem with 2.1.3xxx versions properly dealing with time/date.
In my case on version 2.1.3.128 at a specific time of the day the hub is rewinding the date to a prior date. The time remains correct. Only the date is affected but It is causing my automatons to fail. As I understand it, this problem began on 2.1.3.125 but manifested differently by losing connection with the Hubitat Cloud. They have since posted two hot patches that fixed the loss of cloud access but cause the date issue.
Seeing that there aren't a huge amount of people complaining I suspect this problem is isolated to a few of us.